Installation structure of electric furnace induction coil for fluoride salt production

Abstract

The invention discloses an installation structure of an electric furnace induction coil for fluoride salt production. The installation structure comprises a furnace body (1). The installation structure is characterized in that an induction coil layer (2) is arranged on the furnace body (1); a plumbago crucible (3) is arranged in the middle of the furnace body (1); a calcium oxide layer (4) is arranged between the induction coil layer (2) and the plumbago crucible (3); an induction coil (6) of the induction coil layer (2) is arranged at the middle part of the plumbago crucible (3); the plumbago crucible (3) is divided into a feeding zone (8), a reaction zone (9) and a precipitation zone (10); the installation length L of the induction coil (6) is 200-400 mm smaller than the height H of the plumbago crucible (3). An applicant disclosed by the invention finds that no leakage is generated in the production process of fluoride salt by using calcium oxide as a refractory material; the service life of the crucible can be prolonged to more than ten days; the calcium oxide is an optimal refractory material for industrial production of the installation structure.

Description

technical field [0001] The invention relates to an installation structure of an electric furnace induction coil for fluoride salt production, and belongs to the technical field of fluoride salt recycling production. Background technique [0002] Chinese patent CN101818253 discloses a method for separation and purification of electrolytic aluminum waste, which can separate the fluoride salt in the electrolytic aluminum waste, and obtain high-purity fluoride salt (cryolite) after melting and reacting in an electric furnace. The inventor found in experiments that when the existing intermediate frequency electric furnace heats fluoride salt, the fluoride salt will leak out from the graphite crucible, and the characteristic of fluorine element is that it can react with other substances to form fluoride, reducing its Therefore, after the conventional refractory material contacts with the leaking fluoride salt, the melting point will decrease and it will also become liquid, which c...

AI Technical Summary

Problems solved by technology

The inventor found in experiments that when the existing intermediate frequency electric furnace heats fluoride salt, the fluoride salt will leak out from the graphite crucible, and the characteristic of fluorine element is that it can react with other substances to form fluoride, reducing its Therefore, after the conventional refractory material contacts with the leaking fluoride salt, the melting point will decrease and it will also become liquid, which cannot prevent the leakage of the molten fluoride salt

Therefore, ordinary electric furnaces have problems such as easy leakage of fluoride salt, easy damage of graphite crucible and refractory material, frequent replacement, and even contact between leaking molten fluoride and induction coil, resulting in explosion and other problems.

Images